Currently working on some new mods, the ones I can confirm so far that will be released soon:

District mod (name pending)
- More districts for all planets, increase variety so you can actually make decisions on what districts to build and to give more options to get resources and jobs instead of only being able to rely on buildings
- including basic foundry and leisure districts
- mixed districts that produce multiple goods

Starbase mod (name pending)
- More modules and buildings for starbases, some tweaks to existing ones
- Modules for more weapon types including point defense, large weapons, titan weapons
- Buildings for resources and research
- [Maybe !?] Ability to make "highways" for faster fleet movement in your empire
- [Maybe !?] Specialised shipyards for certain ship types

Better Bombardment
- Adjustments to bombardments as they feel too weak

Megastructure mod (name pending)
- Megastructures take too long to get and not all of them are worth the time you have to spend on them
- basic adjustments like being able to build multiple megastructures, no limitations on number of them, tweaks to their effectiveness
- New megastructures for early and late game so you can prepare your empire for the path of megastructures early on
- [Maybe !?] other additions like tech etc. to again actually get your empire moving towards megastructures earlier if you so choose

I made a mod to allow you to build multiple megastructures - no other changes
The one I used was outdated.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2028448081
Might still make a mod to change more about them, but they already got a lot of changes now and are a lot better.